Laser liposuction uses lasers to liquefy the fat before it is removed, making it easier to vacuum out via liposuction. Lasers may also stimulate the production of collagen and elastin, which results in firmer, tighter, and smoother skin. Lasers may also coagulate small blood vessels in the area, which translates to less bruising.
The laser lipo suction technique uses lasers to break up fat before its removal from the body, reducing the need for harsh suction. There are two types of laser liposuction, internal and external.

• External liposuction uses a laser (in the form of a pen or pad) outside the patient’s body before the surgery begins.
• Internal laser liposuction uses a laser attached to the suction device or the end of a fibre-optic probe which is inserted into the area to be treated.

Does Lipo Laser Surgery Work?

While your appearance will be altered initially, cosmetic surgery is not an alternative to maintaining a healthy diet and exercising.
It is important to be aware that while lipo laser may be able to change the shape of your body, it cannot address lifestyle issues. As with all surgical procedures, there are also several risks and complications involved, including infection, blood clots, and scarring. Reduced bruising (possibly) and Quicker recovery (possibly) are Advantages of Laser Liposuction.

What Are the Considerations Before Lipo Laser Surgery?

• You must usually be over 18 and in good general health.
• You should have an ongoing diet and exercise regime.
• Fat must be in certain specific body areas:
  Abdomen, Thighs, Knees, Arms, Neck, Face, …
• Older people may find skin stays saggy.

How Laser Liposuction is Performed

There are two methods of Laser Liposuction.

The first technique has 3 steps:

• The laser is used in the deep fat to break up the fat cell walls allowing the fatty oils to leak out, and disrupt the cells for subsequent removal. This deep layer also contains small blood vessels which the laser coagulates leading to less bruising post operatively.
• The laser is then used in the superficial layer, just under the skin to heat the skin cells in order to stimulate them to produce more collagen and elastin thereby enhancing the skin quality in the post treatment period.
• The final step is the removal of the cell fragments and oils and thus the final reduction in contour.

The second technique uses 2 of the above steps:

This technique uses only the first 2 steps above and rather than removing the cell fragments and oils, these components are absorbed by the body. This technique of laser guided liposuction is usually reserved for areas of very thin fat such as the face and neck.

References

http://www.weightlossresources.co.uk/weight_loss/surgery/laser-lipo.htm
http://www.realself.com/guide/laser-liposuction-overview